Pipe-coupling.



H. C. BREWSTER.

PIPE COUPLING.

APPLICATION FILED NOV- 28. l9 l6.

agiiw 1 Patented July 10, 1917.

arronmvs JPIPErCO UPLmG.

Application filed November 28, 1916. Serial No.

To all whom it may concern."

Be it known that I, HARRY C. BREWSTER,

- a citizen of the'United States, and a resiof such depth that when the stem is enf -dent of Shreveport, in the parish of, Caddo and State of Louisiana, have invented certain new and useful Improvements in Pipe- Oouplings, of which the following is a specification.

My invention is an improvement in pipe couplings, and the invention has for its object to provide acoupling of the character specified wherein the joint is made by a tapered stem within a taperedbox, with a ball-bearing ring for locking the stem against longitudinal -movement, while permitting rotating of the ring with respect to the stem to prevent any ing between the parts, and to reduce the friction between the joints thereby causing them to be. easily unscrewed. a

In the drawings:

Figure 1 is a front view coupling. p

Fig. 2 is an enlarged longitudinal section, and g Fig. 3 is a section on the line 3-3 of,

n the present embodiment of the invention the coupling member co si'sts'of two sections 1 and 2, the section 1 having a reduced tapered threaded stem 3, which is received within a similarly tapered and similarly threaded opening in the section 2. The stem has a cylindrical portion 5 adjacent to the section 1, and the opening 4' is of the improved ed with the opening, there will be a space between the adjacent'ends-of the sectlons corresponding in width to the width of the plain portion 5 of the stem.

Within this annular space between the adjacent ends of the sections and about the internally grooved as shown at 9. The plain plain portion 5 of the stem, is arranged a ring 6, the said ring having a radially threaded opening 7 which is adapted to be closed by a screw plug 8, the said plug having a kerf, as shown, at its outer end for permitting the same to be inserted or removed. Thls opening 7 is midway between the edges of the ring, and at the opening the ring is portion of the stem is similarly grooved as indicated at 10, and the groovesfi and 11.0 cooperate to to a ball race for ring Specification of Letters Patent.

possibility of stickplug 8 has been a series of balls 11. These balls, as shown, provide a lock for locking the ring to the stem, while the said ring is rotatable with respect to the stem and section 1.

With the improved coupling the sections may be screwed tightly together, without the possibility of any sticking between the sections. The ring may be of any suitable material, and the ring acts as a protective for the joint between the elements 3 and 4. As will be seen, the sections 1 and 2 have registering openings for permitting the pas- Patented July to, are.

sage of liquid, .and each section is provided I at its outer end with an internally threaded tapered opening 12 for receiving the tapered portion of a connection 13. It will be understood that the. balls may be inserted and removed through the. opening 7, after the removed.

It will be noted that the ring is fitted in the spacebetween the adjacent ends of the sections to an exact fit, so that when the tapered stem is' screwed into the tapered box there is ,only allowance enough made in the thickness'of the ring to allow the threads in the box and stem to seat perfectly, and any strain by screwing up the joint will thrown on the ring instead of straining the threads. By having the loose ring between the sections, it thereby reduces the frlctlon toaminimum and allows the same to be readily unscrewed no matter how tight the joint may be screwed up.

When the threads 3 and 4 interengage to their full depth, the ring 6 simultaneously contacts with the end of the member 2, and transmits the pressure due to any further screwingv or the pressure due to axlal thrust,

to the balls 11 and their seat in the surface 5. All strain being thus carried by the ball bearings, sticking will be prevented.

1. A pipe joint comprising sections adapted for connection with the pipes, one of the said sections having a tapered socket and the other a tapered stem having threaded i engagement with the socket, and havin a cylindrical portion between the threa ed portion and the end of the section, a rmg,

encircling the plain portion between the sections and rotatable with respect to the sections, the ring and the cylindrical portion having cooperating annular grooves forming a ball race, and balls in the race, sa1d balls being adapted to receive the thrust bethreaded portion and the end of the sectween the ring and the stem when the stem tion, and a ring encircling the cylindrical 10 is screwed hometo prevent sticking. portion between the sections, and a ball 2. A pipe joint comprising sections, one bearingbetween the ring and the cylindri- 5 of which is provided with a tapered socket cal portion forreceiving the thrust of the and the other with a tapered stem having stem whenthe stem is screwed home. threaded engagement with the socket and having a cylindrical portion between the HARRY C- BREWSTER- 

